DE2142284A1 - Device for wrapping palletized loads - Google Patents

Description

Device for wrapping palletized items

The invention relates to a device for wrapping palletized loads with a hose or bag-shaped, preferably by the action of heat

Shrinkable Pia st Ikf Öl ie.

© • Generally speaking, pre-made plastic bags are not new or pull sacks manually over palletized loads and then pull them onto the pallet to expose encased cargo to heat so that the plastic film shrinks and comes into intimate contact with the La- ^ äegut and comes with the edges of the pallet so as to hold the entire pallet assembly together and to prevent shifting within the cargo »Efforts have already been made have been to perform such work with a machine, but left the previously proposed machines

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very much to be wished for. For the state of the art of such machines, reference is made, for example, to British patent specification 974 529 of November 4, 1964 * Reference is also made to the article by Martin Siegel in

PT *

the 1967 volume of the magazine "Modern Packaging Encyclopedia," Section 12.

The object and aim of the invention is to provide a improved machine with the palletized loading gate more effective and faster rait can be wrapped in a plastic film, which generally shrinks the heat »

For this purpose, a machine is provided according to the invention which conveys the palletized cargo to a wrapping station with a conveyor, holds it there during wrapping and then guides it into and through an oven in which the plastic film wrapping shrinks so much that it comes into close contact comes with the load and the edges of the pallet. The plastic film is fed to the machine as a flat, folded tubular web that is pulled off a roll with two pinch rollers, which are located above the wrapping station

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is long5 that it is sufficient for the load to be wrapped *

The roll with your axilla folded flat 3? Olienmaterial is supported in the lower rear part of the machine. The web pulled off there wanders next up to the top of the machine, then on a steering roller forwards to over the middle the wrapping station = where the pinch rollers are, of which the free end part? ·. the track hangs freely s while still the folds of the tubular material are closed. They are essentially flat outer sides of the susammeafolded web directed vertically and lie in a vertical longitudinal center plane of the load »

In the web travel path there is _{namely in front of the pinch rollers 9} between the pinch rollers and the deflection roller. which isn the rear part of the machine diverts the vertical _{path of the web into the horizontal plane, a welding device 9} which acts on the web and welds at least part of the outer surfaces to the adjacent folded ropes in order in this way to effect at least a partial closure of the tubular material limits that

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The extent to which the tube-shaped path over the load can be pulled down. In addition, this weld ensures that the 3? Oil material does not come off the top Part of the cargo can slip off if the film shrinks during heat treatment.

A Abseiraeidraesser, which is located directly under the Klemai rollers, is operated cyclically in order to separate the web behind the weld points except for narrow tear-off bars, which are torn by a pull on the web. However, this cutting process with the knife does not take place before groups of front and rear suction cups have gripped the outer film parts of the web in order to tighten the side parts of the web together with the pinch rollers and prevent them from shifting the plane. Two groups of front and rear suction cups are arranged opposite one another with such a spacing that they grasp the outer film parts in the vicinity of the edges.

The front and rear are used to store the Satigbeoher Support frame, which is pivotably mounted at its lower ends and can move with their upper ends on each other and away from each other.

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frame includes two vertical stands that are rigidly connected to one another at the top »The groups of Suction cups are with arms on the swiveling support arms appropriate. The arms stick out from crossbars inside, which bridge the distance between the two vertical beams of the frame and at their ends with Carriages are provided which are formed in the carriers ! Tours are running. So the carriage with all the components attached to them in the support frame on and expire. Motorized drives ensure that the slides can move on their guides »Suitable Timers ensure that the slides remain in their upper positions while the Move the support frame towards the inside.

As soon as the mouths of the suction cups are covered by the side parts of the polie, pressurized bellows with which the groups of suction cups are connected to their corresponding support arms ₅ ensure that the suction cups move back from the normal protruding positions o In this way the outside lying Jfolienseiten separated from each other and there is an initial opening of the tubular material. In addition, this has the effect that the suction cups together with the

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hold the side portions of the film web substantially taut. If the side parts of the film are in this tightened position, a group of sharp claws will engage the side walls of the film. The sharp claws are pivotably arranged at the outer end of the support arms directly next to the suction cups. Since only the side parts of the film are held by the suction cups, the claws do not engage in the folded film parts lying under the outer parts, although the claws can of course also touch the single-folded parts.

The claws represent a futile feature of the invention represent that it is they who are positive in the side panels the foil intervene ur: ä for an opening of the tubular brass and for slipping over the Take care of the film tube over the load "

If the Folieneeitenteile held by suction cups and especially of claws are moving! Support frame away from each other _s so that the schlauehförmige railway opens completely and can then be pulled over the load. Depending on the height of the load, the cutting knife works either before the loop-shaped path has passed the upper end 3 of the load

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or course afterwards, around the railway, apart from narrow, uncut tear-off bars "cut into." The tear-off bars give the pinch whales the opportunity to Moving the tubular track over the load to some extent to control.

Do the sledges along their guides in moves the support frame down so that the tubular Βε.ηη is sucked over the load until you comes to rest under the edges of the pallet. The sledges tear during the lowering process the still unused tear-off bars of the railway *

As soon as the carriage reaches the lower end of its travel path haTjen. gets into the pressure source of the suction cup! switched off and the claws are folded suriiek, Liun can dä3 wrapped cargo from the wrapping station be retracted into the Viäroie shrink oven.

Further details and features of the invention emerge from the following detailed description and the accompanying drawings, in which preferred embodiments of the invention are illustrated by way of example are"

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ORIGINAL

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In the drawings igenϊ ze

fig * 1 a perspective view of the 'invention Wrapping machine with palletized Load in the wrapping station,

FIG. 2 is an end view of the machine of FIG. 1

also in connection with a palletized Cargo,

3 shows an end view similar to FIG. 2, in which those carrying the suction cups and claws Irsgrahmen swiveled into the innermost layer are,

Fig. 4 is an end view similar to Figs. 2 and 3, in which the support frames have been moved back into the upright positions and the suction cups and claws hold open the lower part of the only single track (dashed lines also show how the track moves further downwards and that Load enveloped),

5 shows a perspective view to explain the relative position of the welding device, KleiMswalssn and cutting knife, which latter just made an interrupted cut.

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Pig. 6 is a top view of the machine;

Pig. 7 shows a section along section line 7-7 of Fig. 2,

Pig. θ is a perspective view of one of the suction cup and jaw assemblies, des (Support arm and the other components, with which made the connection sum! will,

Fig. 9 shows a SPeilsclraitt according to the section line 9-9 the Pig. 7,

Figures 10, 11 and 12

Cross sections through the pinch rollers and the Abselmeidmesser to explain the initial Opening of the track at the lower end by means of the Baugbecher and the claws,

Pig. 13 is a schematic perspective view to explain the drives with which The support frame is pivoted inwards and outwards and the drives with which the arms carrying the suction cups and claws along the support frame and to be moved

Pig, Fig. 14 is a partial perspective view showing shows how eisie from a series of tear-offs prefabricated bags or sacks that are joined together

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is processed with the machine according to the invention, wherein the tearing off of the individual sections is carried out with a pair of tear-off rollers, which with the pinch roller «cooperates,

Fig. 15 is a top plan view of the Pig's tear-off rollers. 14 on a larger scale with broken ones Share,

Fig. 16 is a perspective view of the in

Fig. 15 shown rope of the tear-off orphans and

17 is a perspective view of a modified embodiment of the claw arrangement.

The machine frame is generally provided with the reference number 5 in the drawings. The machine frame 5 consists of spaced apart corner posts 6 and a stronger stand 7 on the front at the rear * The corner supports and the stand protrude from a base 8 to which they are firmly connected, up and carry a superstructure at the top 9. The space between the front string and the back of the The machine is the actual wrapping station into which the palletized load with a conveyor 11

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is brought. Roller tracks 12 and 13 lead to and from the conveyor. The roller conveyor 12 comes from a loading station and the roller conveyor 13 leads to a shrink oven. The charging station and the oven are not shown. The conveyor 11 can be designed in any way. According to the drawing, it consists of swei endless roller chains arranged side by side, which run over sprockets and are guided in _{rails T} so that the palletized drawer can be placed directly on the chains, as is the case FIg. 1 shows. The pallet shown there is in the right position to be wrapped. "

At the rear of the machine, the stand 7 is designed as a roll holder ₅ which takes two supply rolls RR 'of the plastic film _{supply c} As previously mentioned, the film supply in the form of a flat folded tube _s made of the two superimposed side surfaces SP and the parts G folded in between consists of «The loop-shaped web is pulled off flat from the supply roll» The foil supply comes from only one roll, because the arrangement of two rolls only has the purpose of enabling continuous operation, whereby the end of the foil web is then manually removed

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8AP ORIGINAL

the one roll is spliced to the outer end of a fresh roll.

The clamping scales M ₅ with which the folded film tube is pulled from the torrent roll, "are located in the superstructure 9 above the conveyor 11" The film web then moves on a precisely defined path that goes up from the torrat roll at the rear end of the machine a guide roller 15 in the-horizontal fold over, and then finally reach the pinch rolls. in let25ten part of the web, the latter of the pinch rollers is hanging freely _down? in such a way relative to the conveyor down, the plane dee hanging IPolienteiles parallel to is centered between them the sides of the cargo when the palletized load in the TJmhüllungsstellung is _o

The Kleaan rollers are cyclically driven by a drive 16, so that there is an initial advance of the web and its open end can hang down the Kleamwalsen, with the outer side surfaces SP close to one another and the folds still closed between them G- lie.

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In the superstructure 9 is a welding apparatus 17 ₉ is located beside the horizontal portion of the film web path who = · the can connected to each other with the übereinand succumbing en layers of longitudinally folded sehlauchfönaigea spell Dia this check resulting weld joint turns the rear cable of the Balm in a bag or suete ₉ which is long enough to the charging · = good su _s ufflhüllen while the open bottom end over the lower edge of the pallet away protrudes _v on which cargo is "Thereby ₉ that shaped from the hose = · path a sack or a £ üte made man9 prevents that the covering _s is sucked again from the top rope of the load i ^ hen it then to a shrinkage of the film comes "

The welding seal of the web can be provided continuously over the full width of the web. If desired ₉ the welding device can also be designed in such a way that it welds only one rope of each longitudinal fold to the adjacent outer surface ₉ so that the cargo is slightly on the top remains free "There is an advantage here in some lalls, since water or other fire-fighting liquids can reach the cargo ₉ if wrapped palletized cargo is stored in a warehouse _{9" a pain}

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erupts to

Shortly under the pinch rollers there is a cutting knife 18, which extends across the path of the web »When this knife is operated, the hanging end of the web is separated from the web supply, except for narrow tear-off webs NK (Ifigo 5)» which tear easily _f when aan pulls on the hanging part of the track. The actuation of the Abscimeid knife and the sight device are laterally synchronized with respect to the speed, so that the Klesamwalsen move the web, so that the Absehnsid knife separates the web from the zip and the Klemin-yalssK "

Details of the Senweißvorriehtung and the cutting knife will follow later,

dij5
Immediately after the Klemmwalses stop and the web feed is interrupted, the lower hanging end of the sehlauchfb'rmigen web is opened. This is done with two groups of suction cups 20, which are arranged on both sides of the hanging web so that they can be moved inwards and outwards with respect to the web. The suction cups 20 are located on support frames that protrude upwards

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21, each of which consists of awei longitudinal beams 22 ", which are connected at the upper end to a cross member 23 <, The lower end of the support frame 21 is "at 24 pivotally mounted so that the support frame from the erected vertical position according to FIGS. 1 and 2 in inclined positions ", which are dependent on the scope of the cargo to be wrapped.,

The bearings for the support frame 21 are so v; eit removed from the conveyor that the support frame in their upwards facing position are far enough apart to accommodate the widest palletized load for which the Machine is intended «to be able to pick up when this enters the wrapping station and out of the Uffihülluegsstation goes back to the oven; the longitudinal beams 22 of each support frame are so far apart that they are in planes in front of and move behind the cargo to be wrapped, there can be no contact with the cargo if you see the support frames are in the inclined positions, even if the load is stacked very high

The suction cups 20 are located on arms 25g the SiQd directed by the pivotal support frame inside ₀ suction cups 20 3ind ctabe against the support frame!

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arranged so that the latter in their maximally inwardly pivoted positions (Fig. 3) with their Edges lie in vertical planes so that there is complete contact with the outer surfaces of the SP hanging train comes.

As soon as the mouths of the suction cups are closed by the outer surfaces SP of the web, "with negative pressure 3i-shortening bellows 26 respond? With which the groups of suction cups are connected to their associated arms 25. These bellows 26 shorten and pull the suction cups out of the normal ones In this way the outer web surfaces are separated from each other and an initial opening of the tubular web occurs a two-dimensional displacement can be prevented "In such a situation, the groups of downwardly directed claws 27 engage UQd can detect the BstimaußenfläeheQ, pivot outwardly when the jaws nnä down. if now, the film outer surfaces are securely held by the claws and also ueen suction cups, pivot the support frame into the upright vertical position le position so that

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- If -

the loop-shaped path is fully opened. Now, by lowering the arms, the sleek track can be pulled down over the load. During this downward movement, the Qocb tear the non-subdivided tear-off web HK of the

Such a machine can be used for loads of different sizes and can also accommodate loads of different heights within the framework of the bulk dimensions o Obviously, pollen must be used for loads of large dimensions ₉ which have large outer surfaces and also large daswiseheia lying areas while fcleiaeres for loads of larger dimensions tubing verwend'bar isto To aiase Untersohiede the swath dimension @ Bi on _{berücksIeIatigea?} lets see the Abgtaai swiseoeia des Arm @ a 25 © iraes jeäsn Sragrahiaens ο Zum opennes © iaer feesoad ©]? © large BaIm ₀ like maa ai @ for I> ad @ güt @ r maxisslem lkfaages "basötigt ^ the SaragTb @ eo © r unä claws ₉ ta d @ B @ © see di® g @ paokt © m

als b © iaöffa @ n ®im® ^ Bato gg g

Thus, the © feagsataaia ^ © i Laäsgiiterii v © a large circumference over slaen grdSereii angle irarsetoeEkt vm; ü®Uv as ^ eI cargo with less than ® »Uafaug« Ιώ © IIqh cases © but the suction box ¹ with ü <& t häng® Nä®n Bate ia

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safe contact. This is also made possible by different angles of pivoting of the crag frames z ~> i , \ αϊ, the length of the arms 25 adjustable. In order to also ensure that the dimensions of the suction cups are always directed vertically when they touch the hanging outer foil surfaces, the angle setting of the arms with respect to the support frame can also be changed.

The 3? 7, 8 and 9 explain how these various adjustments can be made. The arms 25 are displaceable on parallel Qtierstangsn 30 and 31, which bridge the distance between the longitudinal beams 22 of the support frame 21. "Are located at the ends of these crossbars slide 32 _S ÖIS in LängsträgeiT- 22 ^ au -uad run can. Z-ar Pührung on this run away serve Fülirungsr ollen 34 ₅ 55 _Γ? Δ * ^^ d of which SohlitteUf on Füb5 ? u3gsschisnen 38 Iauf3n _{9 associated} with the Läögsträgem »

Endless roller chains 39 run over axially aligned chain wheels 40 at the upper end of the longitudinal beams and over axially aligned chain wheels 41 at the lower end of the longitudinal beams. The carriages are connected to these endless roller chains so that

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"with simultaneous motorized rotation of the chain wheels Earth the sledges together up and down, depending according to the direction of the initiated rotation.

Pig. 13 explains how the sprockets are driven. The chain wheels 41 at the lower end of each support frame were located on a common axle 42 which also carries a driven chain wheel 43. A drive chain 4 * runs over the -driven chain wheels 43j over a driving '.ettenrac? 45 and a plurality of UiGl.enkriider-n 46 to give the driven sprocket to rotate in the opposite direction _s w © nn a motor A7 is switched on v ^{: t} .rd, which is in drive connection with the driving sprocket "The motor 47 is reversible" zV its excitation and control, a suitable controller, not shown _{5 5} serves the su gse5_gnete also include sensors _9, the 3p on bestiiamta operating at Zuständes ^*: .e.Isweise the absence of a Eolienbate in particular 5-; ellunge-n _s aaspreehen.

Pig, 13 läi ^ st ^ also recognize how eim supporting frame / Aerts away ve. 'Scbwenlrfc werdeso Zn this Zweclc sinä the upper ends of each l'ragrshmen old EIASM Srum eiaer "nölosen Ilollenkett® 48. ^ flowing over hori · = sontal disconnected chain wheels 49 and others 50 out

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is. The "two sprockets that make up your same support frame are assigned, are located on a common axis 51. These adjacent axes 51 rotate in opposite directions, since a Zahnraderpasr 52 is arranged between them, the two wheels of which are in engagement with one another and are each connected to one of the axes 5'I. To drive the chain wheels 59, a strand 48 ′ of one of the chains is guided over a drive sprocket 53, which is driven by a reversible motor 54 can be driven. This motor 54 is the power source for the drive 16 in the superstructure 9. A steering wheel 55 ensures that the strand 48 'remains taut.

Usually, the various chain wheels and axles of the drive are guided in suitable bearings in the machine frame and in the supporting frame.

To move the arms 25 on the cross bars 30 and 31 To be able to do so, each arm is provided with a crosshead 57, through the bore of which the lower crossbar 30 is passed istj and a saddle 58 which is adjustable on the transverse adapter is attached and the upper transverse rod 31 includes. By shifting the saddle from the front to the front on the back of the crosshead, i.e. in the longitudinal direction of the arm, lets you tilt your arm up or down,

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so that it changes its angular setting in relation to the cantilever "In this way it is possible to adapt to the pivoting angle of the cantilever frame and the length _{9 to} ensure in any case" that the mouths of the suction cups are correctly aligned ₉ when they are the hanging outer surface of the Eolienbaha · =

As a guide for the R <slatiT? Fo © if © guBg between the saddle 58 UBD crosshead dieat © la © Milaniagsbaba 59 of the top of the crosshead aa _s in a Führungsgrage 60 on the underside of the saddle running pot Ua the saddle in the selected Adjustment on the crosshead EU sieher & g siad on opposite sides of the crosshead 57 protective rail *! 61 fastened ", which work together with screws 62 on the oater side of the saddle", which reach through the seat vises and into the saddle

Each Ann consists of two flat plates that are flat with an ead with iron cross pieces 64 and at the end with a punched metal frame 65. The plates 63 hold the cross head 57 so that it can be moved and place it between the top pieces. t © n support surfaces 66 on the sides of the cross head ηηά touch

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the underside of the slide rails 61. Detachable terminal strips 66 on the crosshead 57 encompass the plates 63 and in this way hold the arms in the selected one Longitudinal adjustment.

The ends of the plates 63, which are connected to the metal bracket 65, have a fork with parallel Fingers 67, between which a connection block 68 is adjustable relative to the arms in the longitudinal direction. The Bloek 68 is hollow and forms the connection via the the suction cup 20 is connected to a vacuum source will. The suction cups are located on the face of the Bloekee and are aligned with the inside of the block ITertoiiaöuiag. On the back of the connection block ebeafslls in connection with the interior a pull-together Bellows 69.

The bellows serving as a connecting part between the connection block and the vacuum source consists of a front half 70 and a rear half 71. Both halves have a tubular housing. The front half is connected to the connection block via the hub and has a tubular socket 72 which is connected to it and projects rearward. This tubular extension protrudes versebieblioh through the hub of the rear half 71 and

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is telescopically displaceable in a tube 73 of larger diameter "This tube 73 is about a Coupling 74 to the hub of the rear half of the bellows tied together. The tube 73 is in a bore in the crosshead 57 displaceable and anchored with the rear end in the cross piece 64, v / o it via a flexible one Hose 75 is connected to a stationary suction line, so that the suction cup assembly during operation the machine can perform all movements unhindered =,

A spring 76 in the tube 73 is supported at the end of the tube extension 72 in order to keep the bellows in the extended position. This stretched position is defined by the abutment of a stop collar 77 of the tube attachment 72 on the edge of the hub of the rear half of the bellows. An opening 78 in the wall of the tube attachment 72 within the bellows enables the bellows to be _{pulled together by negative pressure 9} when the mouth of the suction surface is thereby be completed ^ that they come to ^{rest on an outer S 1} O-lienflache. By Yerkürsuag of Balgss tiird the AnschluSbloek zurüekgezogeB "" Ds this Yorgang carried simultaneously on all arms 25 causes _9, the retraction movement of all Saugbeoher a anfäaglich © opening of schlauehförmigeu JfoXieabahn on raters' end-

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The suction cups on each arm lie next to one another in horizontal rows. This Nebeneinanderaiiordnung the Ssugbecher leads äazu _s that the part of the gripped J? Olienmaterials is held as taut between the Saugbecheria that the claws 27 can hindurehgreifen through the sheet material ₉ when ο they operated in accordance with "

Although the special design of the outer claws is not critical, a construction that has been tried and tested in practice will be explained here. Bs is vm a U-shaped part 80 Stang ₉ whose one flange is ao shaped to receive four adjacent sharp claws 81 _s which are as far suseiaaader that each of the two Mittellcrallen between two Sau.g'oeeher-n lie. The other surface of the stamped part is attached to an arm 82 which bridges the gap between the plates 63 and is supported there with a sliding pin 83 _o A pneumatic cylinder 84 is located between the pivoting

bar bearing arm 82 irad über MetallMgel 85, which, like

₉ are the "bfrßaefeTbarteß Bnü®n OCE plates 63 comparable n Giesesi Is üifeek d © r liigsl 65 sätseis with two to 85 'frerselieag AEIE flash sq nnü abut the Iiraeziflachen the Platt®ia 63 secured thereto"

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The dimensions waü the shape of the Unfö part 8O ₉ the length of the Schwenkame 82 and the position of the ßelenkstiftes 85 _s opposite the suction cups ₀ is chosen so that "with withdrawn suction cups ₉ the claws forming the claws 81 compared to their normal retracted position down and offer v © r pivot ₉ «^ hen c! @ 3? paeusiatiseh © 2jliBder is operated according to a Yergroßerraig Seimer length" on "this fall ©, the claws in the won dea sucks & eenern overall = preserved Poli material is an _o For YewollstäQäigung of Arbeitsbubes ier Claws (claws 81) enter the spitsea of the claws in an abutment 86 ₉ which consists of a dumal = block 9 which is attached to the front of the connection _{block 68 "9 to} hold the seized foil material .

3? Alls © ΕΊ-Jünsebt köaü © B »as shown in Fig. 17 Spits @ a ä @ r ErasilsQ Sctalt © r £ läeb @ n 87 v die sussmiaen ait des abutment 86 © iae

and Qas AbscnaeiäaesssE ¹ 18 sa

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and swiveling outwards, the drive motor is reversible. However, such reversing is not necessary for driving the pinch roller or the A'Dsohneknife, because the latter two parts require an intermittent drive. For this purpose, there is an electrical coupling . 90 conventional training between one of the Slemmv / alsenachsen and a driven gear 91 provided * This coupling is always üann turned on when a pinch roll rotation is called for in a similar manner -. / erbindet an electric clutch 90 ', the circumferential cutting blade with a angetrisbeaen Sahnrad ^91! to ₅ when a Absehneidvorgang v made / ground * Eeide gears 91 '91 ³ are 92.92 driven' continuously iibsr from the drive timing belt. Ba of Bahnvorsehub should not take _place? vusrm the 3? ragrahmen be pivoted 21 inward and zn this time, no cutting is required, the reversal of the direction of rotation interferes the drive motor does not require the use of the same drive for all three punctures «,

Only one of the pinch rollers is driven. This roller has a solid metal surface which cooperates with a group of rubber rings 95 aa of the other pinch roller in order to exert a good pull on the plastic film. So you can adjust the time and duration for the actuation of the electric

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Clutch- 9O5 which is activated each time the precisely determine the conveyed length.

The cutting knife "consists of a gununiura-coated roller 96 and a knife bar 97 _- which carries the intrinsic knife" which can penetrate slightly into the G-ummiwalsen = · jacket if the knife bar and the orphan rotate together. Obviously, "sum Ab = scimc" is required -iden, with one turn ■> to avoid difficulties "when pulling down a separated length of web over the pallet load ₅ , the edge © of the knife has interruptions along its length ₉ so there is no continuous cut, but rideable webs W £ remain9 the one cut length of the track "remains in connection with the rest of the track"

The machine used in the illustrated device 17 is conventionally formed New York Convention consists of si '? Ei electrically bebeisteü geleaklg miteisaraäer .Backen-bound 98 _P 99 ₉ siadj so long that si di © © G-esaratb3? Eite the "widest Bate üb © rspaBn @ B kSaasa in the open Eustsüä so woit staseiHaBaesllegaaa that dl © Bate unhindered biQdure! ilai2f © B kaaa _o ΕΙώ! loader 100 serves gum Sehludes the cheek of ¥ @ rschv? eißi2Qg9 su the VerstM-Bäliches Torweise

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the train takes place.

A modified embodiment of the invention is shown in FIGS. Here the machine is designed to work with a shrinkable roller conveyor consisting of a series of prefabricated pouches or sachets. In this case, no welding device and no trimming cutter are provided on the machine. Rather, a pair of tear-off rollers 101 is now provided on the machine, which works together with the pinch rollers in order to tear off a sack or bag from the web at the right moment. In order to facilitate this tear-off process, the individual sacks or bags are connected to one another by tear-off connections which are designed in a manner similar to the tear-off lines IK. In order to make the tear-off even easier, the tear-off rollers work progressively over the length of the Abrißverbindunge Aue for this reason, one of the rollers helically arranged friction linings 102 carries associated smooth-walled counter-roller are so far away that the leading balis is not disturbed. However, if a tear-off operation is required, do the tear-off rollers make one revolution? vstsSaxenü the pinch rollers remain unmoved «

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Whether the machine is working with ready-made bags or üHiten or o "b on Vordereade the schlauübförmigen Polienbato Naeh a bag the other is formed," beiror to this '' on the load draws ₉ have the arms 25 of ihrea lowest settings x ^ ince enough moved upward weräea ₉ so that the mouth of the bag or pouch Unterraacl freikoEamea "before aEAE imbüllte load be moved out of the ans UmMillungsstation ism in the Schruiapfofen zia.

On the li-ruQd of the foregoing! © scteeilju ^ g the mode of operation of the machine τοίΐ ¥ @ sstä © f31ich g @ iforäea s @ so that feeise more Diskmssioa a @ bi? is required

that the © r

ait © isei "g © eigii®t @ B - @ l © 'icteo" = pia ©

ti <re »3eja eats. fm ®!: ü & t such

SensoE "1Ö3 _O <S © s @ ώ or ia der

68 ä @ r ¥ i © s? pp aag @ © E'äB'St TTiI ^ i ₀ ώμ f @ © t ^ i! ast @ ll (SQ ₅ © Tb all®

der Folieiälb & foTä sixe ¹ Amlag © g @ feoiiii © s siaä od © r laiclito irgsadeiner disser SeasoreB f © itdoes ₀ that one group of suction cups is not ordsiaragsgeiiäß ®b des? Balte out? Anlage © gelronime ^ ist, kaan di © St © iä @ rung öi © lasüäiiae Anhaltes bring »

209810/1277

2U2284

The control also includes other sensors that are like this ordered that they be upon the arrival of the E'olienfcalra at predetermined points and on completion of operations to address those of the different Machine components are designed.

Further modifications of the subject of the application compared to the previously described-ß special embodiment are obvious to the expert.

209810/1277

Claims (1)

2U2284 Claims . ^ Device for wrapping palletized cargo with a tubular or sack-shaped, preferably heat »shrinkable plastic film, characterized in that that a gate-like machine frame (5) above a processing station that receives the loaded pallet is arranged, of which one folded flat in a vertical center plane of the pallet tubular film web can be released freely hanging, and that laterally symmetrical to the film web plane of which borrowed in the wes vertically as a \ acli vertically horizontally movable grippers (20) are arranged that folded the film web in the sewing © of its lower free edge alone at the nieht Record external areas (SP)? apart to open the hose and then to wrap it move the palletized goods around " 2ο device according to claim 1 _? marked dnrcli zwsi support frame (21), which outside of the pallet holder = · space around horizontal axes (24) extending parallel to the Foli @ nbalm @ b © n <f and can be pivoted at their ends remote from the pivot point (24) against fii® Carrying grippers (20) directed towards the film web, mounted movably up and down in the support frame (21) 209810/1277 2U2284 3. Device according to claim 2, characterized in that that the grippers are attached to horizontally aligned cross bars (30, 31), which at their ends with Carriages (32) are guided in the longitudinal members (22) of the support frame (21) so as to be translationally displaceable. 4. Apparatus according to claim 3? characterized, that for the synchronous drive of the carriage (32) in the longitudinal members (22) of the support frame (21) a common Chain drive (39-46) is provided. 5. Apparatus according to claim 3 and 4, characterized in that that between the cross bars (30, 31) "and the grippers (20) an intermediate member (57) is arranged, with which the gripper (20) can be displaced in at least one of two mutually perpendicular planes and / or around a parallel 2ur film web plane extending axis are pivotable. 6. The device according to claim 1 Ms 5 »characterized in that the synchronous pivoting of the gripper (20) © is provided in a common chain drive (48-54). la device according to claim 1 to 6, characterized in that the gripper arrangements are formed by - preferably several nefeen © insa, the arranged »pneumatic suction« - beclism (20), 209810/1277 2U2284 S ₅ , device according to claim 7 » characterized in that the suction cups (20) are mounted so that they can move to a limited extent in the suction direction and are connected via bellows (69) ₅ which shorten in the suction cup = · direction of displacement when there is an internal negative pressure« 9ο Device according to claim 7 and 8 _P characterized in that in addition to and / © d @ r between the suction devices - (20) - preferably pa <gniatls © i! driven claws (81) are provided, which can penetrate the foil part © tightened between the suction cups (20) ₀ IQo device after AnspTUQh 9? marked thereby _? that the claws (81) can be moved in an arched manner against a = preferred = white © yielding support surface (86) ti ο YöTFtQhtwig mach Ansprueti 1 = 1O ₃ dadureh g @ k @ nn2 @ ieh '= n © t _P da8 di © supply roll (R _S E °) for di © F @ li @ nbaha in @ in © a side stand (7 ) The B5maschinengest @ lls (5] is mounted wan di © Bate von der Rolls (R ₈ R ^s ) aaeh above a "bg © z © g @ a, gur Cest © llmitt @ diverted and from d © rt over © r ain Klemmtmlzenpaar is discharged nd Naeh below fr iMag © © (14)., 209810/1277 12. Apparatus according to claim 1 to 11, characterized in that in the vicinity of the film dispensing point over the EU enveloping pallet a horizontally trued Absciineidmesser (18) is arranged. 13. Device according to claim 12, characterized in that the cutting knife (18) has an interrupted cutting edge _P which leaves tear-off webs (NK) undivided. 14. Device according to claim 1 to 13? characterized <> that in the area of the guided film path a © @ u @ rnaht welding device (17) is arranged «, 15 · Yor-rioiiiieig according to claim 1 Ms 14, characterized _s that for the supply and removal of pallets in © Machine frame (5) guided conveyor (11) is" 209810/1277